WAY too OP
lightning on a stick? with a single creature in 6 turns you could directly deal 30 damage, imagine the effects this could have with multiple immortals, phase dragons and quintessence; which btw, have okay defence to be able to survive normal CC if they weren't immaterial.
Far too OP and greatly overshadows Owl's eye as a CC.
I could just de-materialize a creature, it gets the abiliy and Quint it, Wha-la! you have an untouchable nigh-godly CC on the field, not to mention constant barrage on opponents hp if it has nothing better to do.
too powerful.
needs a serious change imho.